2025/06/10 by Sean J. Gunderson, Richard Ignace, Walter W. Golay · 1 voice
Physics and Astronomy · #Gamma-ray bursts and supernovae #Stellar, planetary, and galactic studies #Astrophysics and Star Formation Studies
paper · doi:10.3847/1538-4357/addb46
openalex publication_date 2025/06/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Abstract We present theoretical arguments toward the plausibility of a stellar wind to explain the 16,000 km s −1 line broadening in the optical spectra of WS 35, the central star in the Pa 30 nebula. The wind model is discussed in the context of super-Eddington flows. We argue that WS 35 potentially occupies a new regime of wind driving theory as the first metal-only wind. This framework provides a promising avenue for explaining the high-speed flow. We further describe how future radio observations can provide an independent test of the spherical wind scenario. A magnetically channeled wind would likely produce a relatively flat and bright radio spectral energy distribution. By contrast, a spherical wind should result in a thermal radio spectrum with a canonical continuum slope of ν 0.6 , and a brightness level consistent with the currently predicted mass-loss rate.